Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c8dd3976d9ceee…

MALICIOUS

PDF

79.9 KB
MD5: 0bb091b864fc6418f690a2bdab3b4e8c SHA-1: c5064ea9e18b44bcb9f034a69a7634281842dea0 SHA-256: 35c8dd3976d9ceeece50ecef59d3ddca339312ccf2db8ea213574698a64244d6
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an XFA form which is known to be a vector for exploits. Heuristics indicate a critical vulnerability (CVE-2010-0188) related to LibTIFF within XFA forms, and an embedded script payload. The ClamAV detection further confirms its malicious nature. The embedded script is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by the XFA structure.

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000288.bin
94e65e75d7cf29650a8bc844e294cfd6ec8cd69248f9d8a5639c449cfb8792bb		 pdf-embedded-script PDF raw stream script payload at offset 0x288 81139 bytes

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